gronau



. 2.Sheets-Sheet1. P. GRONAU. MECHANICAL MUSIC WORK.

Patented Mar. 1, 1898.

(No Model.)

2. Sheets-Sheet 2.

(No Model.)

, P. GRONAU.

MECHANICAL MUSIC WORK.

Patented Mar 1,1

UNITED STATEs PATENT Osiucn.

FRIEDRICH GRONAU, OF LE IISIC, GERMANY.

MECHANiCAL MUSiC WGi-iK.

SPEGJZFIOATION forming part of Letters Fatent No. 599,708, dated March 1, 1898.

Application filed June 12, 1897.

disks loosely mounted on a rotary shaft, said disks carrying the means for producing the tone in question and having means in connection therewith for striking or causing the tone to be struck as soon as the particular disk carrying the tone has been'arrested-ia, as soon as a brakeoperated byanote-disk or other suitable means has been applied to said disk; and in order to render the present specification more easily'intelligible reference is had to the accompanying sheetsof draw-v ings, in which'similar letters of reference denote similar parts throughout thejseveral views.

Figure 1 is a vertical cross-sectionof one .form of embodying the present invention;

Fig. 2 is a longitudinal section through the instrument embodied in Fig. 1. Fig.-3 is a side elevation of one of the loosely-mounted disks drawn to a larger scale and showing the.

means for producing the tone. Fig. 4 is a sectional plan of Fig. 3. Fig. 5 is a similar View to that of Fig. 3, showing the mechanism for arresting the disk in operative position. Fig. 6 is a sectional plan of Fig. 5. Fig. 7 is a central cross-section through the disk of Fig. 5; Fig. 8, a front elevation of the disk shown at Fig. 9 Fig. 9, a sectional elevation of the disk of Fig. 8; Fig. 10, a front elevation of a disk provided with bells, and Fig.1]. a sectional end elevation of the disk shown at Fig. 10.

-In any suitable casing is mounted a rotary shaft a, which'may be turned by means of a crank, Fig. 2, or any other suitable means, and on the-said shaft are mounted a series of disks A, loosely mounted thereon and adapted to be arrested by means of a brake mechanism 13, Fig; 1, which may be ofany desired construction. This brake mechanism may be operated from a. note-disk N or by any for rotati Serial No. 640,528. (No model.)

other suitable means. On each disk A are mounted a series of detonating wires or bells, represented by 6, Figs. 3 to 7 as tongues, by 0, Figs. 8 and 9 as musical wires, and by f, Figs. 10 and 11 as bells or ringing spring-coils adapted to be struck by hammers.

The disks A. are separated one from the other by means of collars 0 0, fast on the r0- tary shaft a, while on the said shaft and in proximity to the tongues or to the stems of the hammers of each disk is mounted a striker h, adapted as soon as the said disk is arrested by means of its brake to impinge against the tongue or hammer and cause one of the same to operate tosound the required note. Each disk is provided with several tongues of one and the same key. As shown at Figs. 3 and 5, each brake may be operated by means of; a hook which is spring-pressed against. a note-disk, and when an opening or orifice of said disk passes over the upwardly projecting end of said hook the same will rise,.thereby applying the brake to the particular disk which it is required to operateL -Springs is maybe attached to the collars o, bymeans -of which the disks are kept in engagement with their striker h.

I'wish it to be clearly understood that the present invention is not by any means confined-to the particular means hereinbefore described for carrying out the same, as such means may be modified in any required manner. Y The sounding mechanism is quite inditferent and may 'beof any construction whatever. The means for operating the braking mechanism are also indifferent and may consist of a note disk or sheet N, or of a keyboard or any other suitable device. 1

I claim as my invention- 1. Thegombination of a shaft and means ing each a sounding medium thereon said disks being loosely mounted on the said shaft, a striking mechanism fast on said shaft and means for arresting any of the said disks at the desired moment substantially as described.

2. The combination of a shaft and means for rotating the same, a series of looselymounted disks thereon each having a resounding spring thereon and a striker on the said shaft for each disk, a brake mechanism for each disk and means for operating each the same, a series of disks hav-' 2 seejws Y brake mechanism st the required moment in "the manner and 61 the'purpose substantiallyas, described.

. series of and a note-disk N and meansfer operating a series of disks The combinetien of erotary shaft (1, and 5 A loosely mounted thereon, a, series of resounding wires or tongues on each disk. being tuned as Specified, a coiled-r between each pair of disks havinge spring to 'act as specified, a striker fashion the said 1'0- tary shaft to opera-Le each fongue or wire, a brakes iupi-oximity to each disk said Brakes inserted between .-t;he note-disk lend thebi akes in the manner and for the purpose substantially as described and for .the purpose specified. In teshi-mony'whereof I have signed my' name to this specification in thepresen ee of two subscribing witnesses. FRIEDRICH GRONAU,. I Withesses:

HERM. LARK RUDOLPH FRICKE."

and shown 15 

